<?php
error_reporting(E_ALL);
set_time_limit(0);

date_default_timezone_set('Europe/London');
?>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />

        <title>PHPExcel Calculation Examples</title>

    </head>
    <body>

        <h1>DATEVALUE</h1>
        <h2>Converts a date in the form of text to a serial number.</h2>
        <?php
        /** Include path * */
        set_include_path(get_include_path() . PATH_SEPARATOR . '../../../../Classes/');

        /** Include PHPExcel */
        include 'PHPExcel.php';


// Create new PHPExcel object
        $objPHPExcel = new PHPExcel();
        $worksheet = $objPHPExcel->getActiveSheet();

// Add some data
        $testDates = array('26 March 2012', '29 Feb 2012', 'April 1, 2012', '25/12/2012',
            '2012-Oct-31', '5th November', 'January 1st', 'April 2012',
            '17-03', '03-2012', '29 Feb 2011', '03-05-07',
            '03-MAY-07', '03-13-07',
        );
        $testDateCount = count($testDates);

        for ($row = 1; $row <= $testDateCount; ++$row) {
            $worksheet->setCellValue('A' . $row, $testDates[$row - 1]);
            $worksheet->setCellValue('B' . $row, '=DATEVALUE(A' . $row . ')');
            $worksheet->setCellValue('C' . $row, '=B' . $row);
        }

        $worksheet->getStyle('C1:C' . $testDateCount)
                ->getNumberFormat()
                ->setFormatCode('yyyy-mmm-dd');


        echo '<hr />';


// Test the formulae
        ?>
        <p><strong>Warning: </strong>The PHPExcel DATEVALUE() function accepts a wider range of date formats than MS Excel's DATEFORMAT() function.</p>
        <table border="1" cellspacing="0">
            <tr>
                <th>Date String</th>
                <th>Formula</th>
                <th>Excel DateStamp</th>
                <th>Formatted DateStamp</th>
            </tr>
            <?php
            for ($row = 1; $row <= $testDateCount; ++$row) {
                echo '<tr>';
                echo '<td>', $worksheet->getCell('A' . $row)->getFormattedValue(), '</td>';
                echo '<td>', $worksheet->getCell('B' . $row)->getValue(), '</td>';
                echo '<td>', $worksheet->getCell('B' . $row)->getFormattedValue(), '</td>';
                echo '<td>', $worksheet->getCell('C' . $row)->getFormattedValue(), '</td>';
                echo '</tr>';
            }
            ?>
        </table>